1 files changed, 5 insertions, 0 deletions
diff --git a/actionpack/lib/action_dispatch/testing/test_request.rb b/actionpack/lib/action_dispatch/testing/test_request.rb
index 5d8cd7e619..20288aa7a5 100644
--- a/actionpack/lib/action_dispatch/testing/test_request.rb
+++ b/actionpack/lib/action_dispatch/testing/test_request.rb
@@ -16,6 +16,7 @@ module ActionDispatch
 
     def env
       write_cookies!
+      delete_nil_values!
       super
     end
 
@@ -74,5 +75,9 @@ module ActionDispatch
           @env['HTTP_COOKIE'] = @cookies.map { |name, value| "#{name}=#{value};" }.join(' ')
         end
       end
+
+      def delete_nil_values!
+        @env.delete_if { |k, v| v.nil? }
+      end
   end
 end